SouthWest Technical Products Corp. 69K Computer

I got an email in November 2003 asking if I knew of anyone
who wanted a SWTPC 6809 computer with dual 8-inch disks and terminal.
The sender, David Banks, had a system that had been in storage
since 1987 and did not want to put it in the dumpster. He was
in the Dallas Texas area a few miles from my niece. A few weeks
later David delivered it to my niece's garage. My brother arranged
to have his son ship it to me. The day before Christmas I got
about 100 pounds of computer equipment.

The system was a SWTPC 69K that had been used as a development
system for a motor control project. To increase the computational
speed, AMD 9511 and AMD 9512 floating-point processors were added.
The Introl C compiler math libraries were modified to use the
AMD processors instead of the 6809.

The 69K has 3 Digital Research 16K memory boards, a SWTPC 8K
memory board, a wire-wrap Math coprocessor board, a SWPTC 6809
CPU and a SWPTC 8 inch floppy controller. The I/O cards (left
to right) are SWPTC dual Serial port, a SWTPC floppy controller,
a Music Card, a wire-wrap parallel port, and a second SWPTC dual
Serial port.

The black power transformer has a second transformer on top
of it. This was wired to boost the input voltage. (I guess the
9511 and 9512 use a lot of power.) The 69K power transformer is
smaller than the one in my S09 system.